@shopify/polaris/esnext/utilities/use-is-mounted-ref.js

Shopify’s product component library

import { useRef, useEffect } from 'react';
/**
 * Returns a MutatableRefObject containing a boolean value that
 * represents a components mounted status.
 * @returns MutableRefObject<boolean> The mounted status
 */
export function useIsMountedRef() {
    const isMounted = useRef(false);
    useEffect(() => {
        isMounted.current = true;
        return () => {
            isMounted.current = false;
        };
    }, []);
    return isMounted;
}